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Yammer P

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Chromatic Aberration correction in ACR 6.7

Mar 6, 2012 1:57 AM

I'm just having a quick play with 6.7RC before I have to go out for the day.

I just found a tiny bit of CA in one of my images, and headed for the manual sliders. To my surprise, they have vanished! I tried the lens profile tab and found a tick box for 'Remove Chromatic Aberration'. Does this mean that CA correction is now fully-automatic?

My main concern is that I won't be able to fine-tune existing correction, but if ACR now does additional fine-tuning automatically (and does it well) I will be a very happy bunny. Indeed, a quick test with a couple of images is giving better than normal results using the default correction.

Any chance of confirmation, please, anyone?

3905 Views 29 Replies Latest reply: MadManChan2000, Mar 9, 2012 5:52 AM

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1. Vit Novak,

Mar 6, 2012 3:04 AM in reply to Yammer P

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Looks like it is fully automatic now - tried on one photo and it works even if I select no lens profile or profile of wrong lens. Manual CA correction (red-green, blue-yellow) sliders are also gone

Interesting thing, PV2012 is recognized and displayed, but you can't adjust some sliders (exposure etc) unless you convert back to 2010

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2. b2martin_a,

Mar 6, 2012 4:54 AM in reply to Vit Novak

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I have downloaded ACR 6.7RC, but have not installed it yet. You say PV2012 is recognized and displayed, but is it now available in ACR 6.7RC as an option to use? I assumed we would have to wait for CS6 with ACR 7 before Camera RAW would have the PV2012 option.

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3. MadManChan2000,

Mar 6, 2012 5:17 AM in reply to b2martin_a

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The 6.7 RC's design is to provide PV 2012 rendering compatibility with Lr 4. The default PV in 6.7 will be 2010 (just like it was in 6.6). And as you've discovered, if you bring in an image with existing settings using PV 2012, you can render those results in 6.7 RC (again, for compatibility reasons) but you will not have access to the controls.

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4. Yammer P,

Mar 6, 2012 6:57 AM in reply to MadManChan2000

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Eric, can you confirm that manual CA adjustment is no longer needed because ACR fine tunes correction in addition to normal lens corrections?

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5. MadManChan2000,

Mar 6, 2012 7:12 AM in reply to Yammer P

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Correct.

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6. Yammer P,

Mar 6, 2012 9:14 AM in reply to MadManChan2000

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MadManChan2000 wrote:

Correct.
That is extremely cool. Thanks!

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7. Yammer P,

Mar 8, 2012 1:00 AM in reply to MadManChan2000

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I'm actually very surprised that a bigger deal hasn't been made of this. It's not even mentioned in the release notes.

I've wanted this feature in ACR for years, and I've always thought it would be achievable, after all, what we can do by eye can probably be done much quicker and more accurately by computer. Correction using tables was good, but I usually needed to finish off by eye.

To my disbelief, I find that many people ignore CA problems, and yet spend time and money striving for sharper images and expensive lenses, when spending a few seconds reducing CA in software will go a long way to achieving this.

I'm raising a glass to the ACR/Lightroom team. You have just saved me lots of processing time and eye strain. Cheers!

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8. Zebrdee,

Mar 8, 2012 1:24 PM in reply to Yammer P

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Automatic Chromatic Aberration correction in ACR 6.7 doesn't work properly, how do you revert to ACR v6.6?

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9. MadManChan2000,

Mar 8, 2012 1:34 PM in reply to Zebrdee

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Do you have an example? (Note that the checkbox only deals with lateral CA, not other types of CA.)

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10. Zebrdee,

Mar 8, 2012 1:37 PM in reply to MadManChan2000

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Yes but it's not my photo. I'd really like to get back to v6.6 if you know how.

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11. MadManChan2000,

Mar 8, 2012 1:45 PM in reply to Zebrdee

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You can download here (Mac and Win):

http://www.adobe.com/support/downloads/detail.jsp?ftpID=5311

http://www.adobe.com/support/downloads/detail.jsp?ftpID=5312

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12. Zebrdee,

Mar 8, 2012 1:50 PM in reply to MadManChan2000

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I tried that;
Photoshop Camera Raw 6.6 Update
Installation failed. Error Code: U44M2P7

Photo link - not my photo - Look at the sign text; Why I want my Canon 5D Mark III | http://bit.ly/18T8x6

Can the old 6.6 way be restored and keep the auto check box as an option?

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13. ssprengel,

Mar 8, 2012 1:58 PM in reply to Zebrdee

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Maybe you need to remove the existing Camera RAW.8bi file, first.

On my Windows 7 64-bit computer the plug-in is located, here:

C:\Program Files\Common Files\Adobe\Plug-Ins\CS5\File Formats

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14. Zebrdee,

Mar 8, 2012 2:04 PM in reply to ssprengel

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Thanks but still the same error message.

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15. MadManChan2000,

Mar 8, 2012 2:11 PM in reply to Zebrdee

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Did you try the manual install instructions? Usually, the drag-and-drop solution will work.

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16. Zebrdee,

Mar 8, 2012 2:23 PM in reply to MadManChan2000

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Yes tried that. Tried removing the x86 file as well. Are there some folders to delete? Uninstall photoshop and reinstall?

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17. ssprengel,

Mar 8, 2012 2:33 PM in reply to Zebrdee

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If you did the manual install, then there’s no need to do the automated installed so there’d be nothing to give you the error message.

What is your manual process for manually replacing ACR 6.7 RC with ACR 6.6? And after you’ve done that, what does Help / About Plug-ins… / Camera RAW show for the version, and does it show more than one Camera RAW plug-in listed?

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18. Zebrdee,

Mar 8, 2012 2:39 PM in reply to ssprengel

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From http://www.adobe.com/support/downloads/detail.jsp?ftpID=5312

Manual installation on Windows®:

1. Exit Photoshop CS5 and Adobe Bridge.
2. Open the download file, double-click AdobePatchInstaller, and follow the onscreen instructions.
3. Launch Photoshop CS5 or Adobe Bridge.

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19. Yammer P,

Mar 8, 2012 2:49 PM in reply to Zebrdee

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Zebrdee wrote:

Photo link - not my photo - Look at the sign text; Why I want my Canon 5D Mark III | http://bit.ly/18T8x6

Can the old 6.6 way be restored and keep the auto check box as an option?
That is a JPEG, so it's probably not as easy to auto-correct with the built-in compression.

Having said that, ACR does seem to do a fair job of removing its CA on my computer, although there is a significant amount left over. It would be interesting to see how it manages with the original raw file.

The check box is an integral part of 6.7.

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20. Zebrdee,

Mar 8, 2012 3:01 PM in reply to Yammer P

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6.7 is beta is it not? It can be changed.
Still haven't managed to back to v6.6

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21. Noel Carboni,

Mar 8, 2012 3:02 PM in reply to Yammer P

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Okay, I haven't run 6.7 yet, but I think I will actually try the RC after reading this thread.

With 6.6 and older I often have to dial in a little CA correction beyond what the profile correction, at 100%, provides, and sometimes I have to settle for a compromise because getting rid of all of it in one corner leaves some in another corner.

I have great hope for content analysis, and it would be really REALLY great if the software could just get it right all across the entire image. So my question (before trying 6.7 and having a look-see for myself) is this:

Is this version actually capable of detecting and minimizing CA in differing amounts all across the image?

If so, that would be really cool.

-Noel

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22. Yammer P,

Mar 8, 2012 3:15 PM in reply to Noel Carboni

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Noel Carboni wrote:

Is this version actually capable of detecting and minimizing CA in differing amounts all across the image?
Put it this way: up to 6.6, one of my lenses usually produced uneven residual CA on the left compared with the right, when 'corrected' by lens profile in 6.6. I often had to add different amounts of manual correction to fix left or right, and usually settled somewhere inbetween.

6.7 seems to fix both sides equally, leaving an insignificant amount of CA. It works on everything I've tried so far.

People wanting to test 6.7RC should make a copy of the existing plug-in first, say ~Camera Raw.6.6.8bi, before updating. Then it's much easier to roll back if you don't like it.

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23. Yammer P,

Mar 8, 2012 3:19 PM in reply to Zebrdee

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Zebrdee wrote:

6.7 is beta is it not? It can be changed.
Still haven't managed to back to v6.6
I thought you meant that you wanted to restore 6.6 but keep the check box. New spectacles.
If you search the forum, there are a few step-by-step guides to rolling back to an older version (some by me). Maybe it should be in the FAQ.

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24. Zebrdee,

Mar 8, 2012 3:37 PM in reply to Yammer P

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OK, done. Used the Windows 'previous versions' way as in this topic;

http://forums.adobe.com/message/4092599

The CA in that photo is so bad even the old 6.6 sliders cannot completely fix it.

Thanks all.

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25. MadManChan2000,

Mar 8, 2012 4:07 PM in reply to Zebrdee

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Yeah I think that example is unusually egregious, though it's also true the new auto CA would likely work better on the raw image itself (rather than the JPEG, even the full-res one). For technical reasons, lateral CA is best corrected on raw image data. Even so, the auto CA internals can likely be tuned to work even in this strong case.

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26. Noel Carboni,

Mar 8, 2012 10:37 PM in reply to Yammer P

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Yammer P wrote:
6.7 seems to fix both sides equally, leaving an insignificant amount of CA. It works on everything I've tried so far.

Yes, exactly as advertised. I wasn't sure before whether one would have to choose the 2012 method to get this feature, but no - it improves 2010 process images, and all the same defaults as before apply.

It's impressive that it will take even images that have been tweaked via profile + manually to be as good as I could get them and do an even better job aligning the colors. I have a number of images I happened to save as full-sized PSDs just after conversion using Camera Raw 6.6 (in preparation for making panoramas), so I was able to directly compare before/after results with those from 6.7.

Impressive indeed! I agree with Yammer P's comment about this not being touted as a big enough deal. You've just incrementally improved all the lenses in my kit. Well done, Adobe team!

-Noel

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27. Yammer P,

Mar 9, 2012 12:34 AM in reply to Noel Carboni

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Noel Carboni wrote:

It's impressive that it will take even images that have been tweaked via profile + manually to be as good as I could get them and do an even better job aligning the colors

I wondered what it does with all the manual CA settings I've added over the last couple of years. I've just had a look, and as far as I can see, it deletes them! This is fairly important to know, in case you plan on rolling back to an earlier version (not me though).

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28. Noel Carboni,

Mar 9, 2012 5:17 AM in reply to Yammer P

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I wondered about that, but couldn't check it directly as I use the central database. Thanks for that extra bit of info!

Like you I don't see myself moving backward.

It could also affect a mixed shop that uses different versions of Adobe software (or doesn't have everyone up on the latest update at the same moment).

-Noel

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29. MadManChan2000,

Mar 9, 2012 5:52 AM in reply to Yammer P

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When reading older images with manual or profile-based CA enabled, ACR will check the Remove Chromatic Aberration box.

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